diff --git a/app/assets/stylesheets/mobile/login.scss b/app/assets/stylesheets/mobile/login.scss
index 60d121b9eea..0ea664e63f5 100644
--- a/app/assets/stylesheets/mobile/login.scss
+++ b/app/assets/stylesheets/mobile/login.scss
@@ -190,6 +190,7 @@
       width: calc(100% - 2em);
       position: sticky;
       position: -webkit-sticky;
+      z-index: z("header");
       top: 0;
       background-color: var(--secondary);
     }